Because only after the guests enter the restaurant and order, the Food and Beverage Department can start to produce food and beverage products, but the number of guests and their consumption of food and materials are unknown and difficult to predict. Therefore, the production volume of the Food and Beverage Department is very random, the number of guests is sometimes more and sometimes less, the consumption is sometimes big and sometimes small, therefore, its production volume is generally difficult to predict, to make the food and beverage production plan has brought a lot of difficulties.

The catering product refers to the catering enterprise to the community, and can meet the needs of people's physical products and intangible services of the general term, including the product color, shape, composition, quality, service and so on.